Authorities have released more information about last month's murder suicide in Lewisville...Watonwan County Sheriff Gary Menssen says 59 year old Chet Gronewald suffered a fatal head injury... not a fatal gunshot wound as was initially reported.The Minnesota Bureau of Criminal Apprehension has completed the investigation into the murders of Gronewald and his 25 year old stepdaughter Ashley Sullivan and the suicide of 28 year old Shawn Haugen...more details will be released Friday.